I have this light on a 75g that I recently set up.

"The Coralife F/W Aqualight T-5 is a double lamp fixture ideal for freshwater and planted aquariums. Includes one Colormax Full Spectrum and one 6700K T-5 (5/8 diameter) fluorescent lamp. Features an on/off switch, a built in electronic ballast, sleek black aluminum housing, a highly polished reflector, acrylic lens cover and adjustable width tank mounts. T-5 lamps are 28 watts each."
Do I need to up the lighting to add plants or can I do low light varieties?

"The Coralife F/W Aqualight T-5 is a double lamp fixture ideal for freshwater and planted aquariums. Includes one Colormax Full Spectrum and one 6700K T-5 (5/8 diameter) fluorescent lamp. Features an on/off switch, a built in electronic ballast, sleek black aluminum housing, a highly polished reflector, acrylic lens cover and adjustable width tank mounts. T-5 lamps are 28 watts each."
Do I need to up the lighting to add plants or can I do low light varieties?